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Finding the Fourth Proportional to 327,085.60, 490,628.40 and 285,613.60

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Solution

The fourth proportional to 327,085.60, 490,628.40 and 285,613.60 is: 428,420.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,085.60 : 490,628.40 = 285,613.60 : x
  2. Step 2: Convert to fraction form
    327,085.60/490,628.40 = 285,613.60/x
  3. Step 3: Cross multiply
    327,085.60x = 490,628.40 × 285,613.60
  4. Step 4: Simplify right side
    327,085.60x = 140,130,143,586.24
  5. Step 5: Solve for x
    x = 140,130,143,586.24/327,085.60
  6. Step 6: Final answer
    x = 428,420.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.